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Geforce GTX 690 vs Radeon HD 6450 (OEM) 1GB

Intro

The Geforce GTX 690 comes with core clock speeds of 915 MHz on the GPU, and 1502 MHz on the 2048 MB of GDDR5 memory. It features 1536 SPUs along with 128 Texture Address Units and 32 Rasterization Operator Units.

Compare all that to the Radeon HD 6450 (OEM) 1GB, which comes with a clock frequency of 750 MHz and a GDDR5 memory speed of 900 MHz. It also makes use of a 64-bit memory bus, and makes use of a 40 nm design. It is made up of 160 SPUs, 8 TAUs, and 4 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6450 (OEM) 1GB 31 Watts
Geforce GTX 690 300 Watts
Difference: 269 Watts (868%)

Memory Bandwidth

Performance-wise, the Geforce GTX 690 should in theory be much superior to the Radeon HD 6450 (OEM) 1GB in general. (explain)

Geforce GTX 690 384512 MB/sec
Radeon HD 6450 (OEM) 1GB 28800 MB/sec
Difference: 355712 (1235%)

Texel Rate

The Geforce GTX 690 will be quite a bit (approximately 3804%) more effective at AF than the Radeon HD 6450 (OEM) 1GB. (explain)

Geforce GTX 690 234240 Mtexels/sec
Radeon HD 6450 (OEM) 1GB 6000 Mtexels/sec
Difference: 228240 (3804%)

Pixel Rate

The Geforce GTX 690 will be quite a bit (more or less 1852%) faster with regards to AA than the Radeon HD 6450 (OEM) 1GB, and capable of handling higher resolutions better. (explain)

Geforce GTX 690 58560 Mpixels/sec
Radeon HD 6450 (OEM) 1GB 3000 Mpixels/sec
Difference: 55560 (1852%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

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Geforce GTX 690

Amazon.com

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Radeon HD 6450 (OEM) 1GB

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

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Model Geforce GTX 690 Radeon HD 6450 (OEM) 1GB
Manufacturer nVidia AMD
Year April 2012 February 2011
Code Name GK104 Caicos
Memory 2048 MB (x2) 1024 MB
Core Speed 915 MHz (x2) 750 MHz
Memory Speed 6008 MHz (x2) 3600 MHz
Power (Max TDP) 300 watts 31 watts
Bandwidth 384512 MB/sec 28800 MB/sec
Texel Rate 234240 Mtexels/sec 6000 Mtexels/sec
Pixel Rate 58560 Mpixels/sec 3000 Mpixels/sec
Unified Shaders 1536 (x2) 160
Texture Mapping Units 128 (x2) 8
Render Output Units 32 (x2) 4
Bus Type GDDR5 GDDR5
Bus Width 256-bit (x2) 64-bit
Fab Process 28 nm 40 nm
Transistors 3540 million 370 million
Bus PCIe 3.0 x16 PCIe 2.1 x16
DirectX Version DirectX 11.0 DirectX 11
OpenGL Version OpenGL 4.2 OpenGL 4.1

Memory Bandwidth: Bandwidth is the maximum amount of data (measured in MB per second) that can be moved past the external memory interface in a second. It is worked out by multiplying the card's interface width by its memory speed. In the case of DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. This figure is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

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Geforce GTX 690

Amazon.com

Check prices at:

Radeon HD 6450 (OEM) 1GB

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

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